钢管2018，Vol.47Issue(3)：16-19,4.
GT90连续油管对接焊接头的组织和性能分析
Microstructure and Mechanical Properties of Butt Welding Joint of GT90 Coiled Tubing
李博锋 1刘云 1汪强 1杨耀彬1
作者信息
- 1. 宝鸡石油钢管有限责任公司,陕西 宝鸡 721008
- 折叠
摘要
Abstract
Welding procedure test is conducted on the GT90 coiled tubing to analyze the structure and mechnical properties of its weld joint.It is concluded that the weld joint is of granular bainite structure; and due to the effect of welding thermal cycle, the butt welding weld joint HAZ shows softening that will result in decreased hardness and strength.During the process of fatigue bending deformation, strain will concentrate at the soften area and lead to fracture, which will make the fatigue life of the joint lower than that of the parent metal.So, in order to reduce softening phenomenon, improve mechanical properties and increase fatigue life of a weld joint, it is recommended to use smaller linear energy input to weld a coiled tubing.关键词
连续油管/GT90/焊接/对接接头/热影响区/组织/性能Key words
coiled tubing/GT90 grade/welding/butt welding weld joint/heat affected zone/microcstructure/mechanical properties分类
矿业与冶金引用本文复制引用
李博锋,刘云,汪强,杨耀彬..GT90连续油管对接焊接头的组织和性能分析[J].钢管,2018,47(3):16-19,4.
